Non-linear photonic crystals as a source of entangled photons

Details Non-linear photonic crystals as a source of entangled photons Non-linear photonic crystals as a source of entangled photons

2004-09-25

arxiv.org/abs/quant-ph/0409171v1

Physical Review Letters, 93, 040504 (2004)

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.93.040504

Non-linear photonic crystals can be used to provide phase-matching for frequency conversion in optically isotropic materials. The phase-matching mechanism proposed here is a combination of form birefringence and phase velocity dispersion in a periodic structure. Since the phase-matching relies on the geometry of the photonic crystal, it becomes possible to use highly non-linear materials. This is illustrated considering a one-dimensional periodic Al$_{0.4}$Ga$_{0.6}$As / air structure for the generation of 1.5 $\mu$m light. We show that phase-matching conditions used in schemes to create entangled photon pairs can be achieved in photonic crystals.

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